digging through/documenting legacy code

///@file legacy_defines.h

#define X313_MAXWIDTH       65536 // 4096 // multiple of 128

#define X313_MAXHEIGHT      65536 // 16384 // multiple of 16 - unsafe - not enough room for black level subtraction

#define X313_MAXHEIGHT_SAFE 65536 // 4096 // multiple of 16  OK for black level subtraction TODO: disable black level if unsafe

#define X313_MAP_FRAME ((X313_MAP_FPN) + (X313_MAXWIDTH) * (X313_MAXHEIGHT_SAFE))

#define X313_MARGINS 4

#define X313_TILEHOR 16

#define X313_TILEVERT 16

#define   X313_TIMESTAMPLEN 28 // pixels used for timestamp (in linescan mode added after the line)

#define   X3X3_RSTSENSDCM          // FPGA DCM can fail after clock change, needs to be reset

#define   X3X3_SENSDCM_CLK2X_RESET // reset pclk2x DCM also

#define I2C359_CLK_NUMBER 4

#define     CCAM_ARST_OFF

#define     CCAM_RESET_MCONTR_ON  // Set mode that resets memory controller pointers after each frame sync. TODO: Later - make it work without?

#define     CCAM_ENDFRAMES_EN     // Enable ending frame being compressed if no more data will be available (frame ended before specified number of blocks compressed)

#define     CCAM_DCLK_ON

#define     CCAM_CNVEN_OFF

#define     CCAM_MRST_ON

#define     CCAM_EXTERNALTS_EN // Maybe use default as enabled - yes, it will not be active if not available

#define     CCAM_CNVEN_ON

#define     CCAM_POSRST

#define     X3X3_SENSDCM_HACT_ZERO

#define     X3X3_SENSDCM_HACT_LATE90

#define     X3X3_SENSDCM_HACT_EARLY90

#define     X3X3_SENSDCM_INC

#define     X3X3_SENSDCM_DEC

#define     X3X3_SENSDCM_INC90

#define     X3X3_SENSDCM_DEC90

 #define COMPCMD_DEMOS(x) ((1<<13) | (((x) & 0x0f) << 9))

 //  6 blocks output per macroblock:

 #define DEMOS_MONO6     0 // original monochrome YCbCr 4:2:0 with zeroed color components

 #define DEMOS_COLOR18   1 // original color YCbCr 4:2:0, 3x3 demosaic (18x18 tiles)

 #define DEMOS_JP46      2 // original jp4, (4:2:0, zero color), decoded by regular JPEG decoder

 #define DEMOS_JP46DC    3 // dc-improved: same as DEMOS_JP46, but DC difference separate for each component

 #define DEMOS_COLOR20   4 // color YCbCr 4:2:0, 5x5 demosaic (20x20 tiles) - not yet implemented

//  4 blocks output per macroblock:

 #define DEMOS_JP4       5 // similar to DEMOS_JP46 ,   but zero color components are not output

 #define DEMOS_JP4DC     6 // similar to DEMOS_JP46DC , but zero color components are not output

 #define DEMOS_JP4DIFF   7 // differential red := (R-G1), blue:=(B-G1), green=G1, green2 (G2-G1). G1 is defined by Bayer shift, any pixel can be used

 #define DEMOS_JP4HDR    8 // similar to DEMOS_JP4DIFF, but second green (opposite from the reference one) is encoded without subtracting:

                           // red := (R-G1), blue:=(B-G1), green=G1, green2 (high gain)=G2) (G1 and G2 - diagonally opposite)

 #define DEMOS_JP4DIFF2  9 // similar to DEMOS_JP4DIFF, but all differences are divided by 2 to fit into 8 bit range:

                           // red := (R-G1)/2, blue:=(B-G1)/2, green=G1, green2 (G2-G1)/2

 #define DEMOS_JP4HDR2  10 // red := (R-G1)/2, blue:=(B-G1)/2, green=G1, green2 (high gain)=G2),

 #define DEMOS_MONO4    14 // monochrome, but the block scan order is still the same as in YCbCr 4:2:0 (macroblocks in scan order, block in 2x2 macroblock in scan order)

// [8:7] == 0,1 - NOP, 2 - disable, 3 - enable subtracting of average value (DC component), bypassing DCT

 #define COMPCMD_DCSUB(x) ((1<<8) | (((x) & 1) << 7))

// [6] == 1 - enable quantization bank select, 0 - disregard bits [5:3]

// [5:3] = quantization page number (0..7)

 #define COMPCMD_QTAB(x) ((1<<6) | (((x) & 7) << 3))

#define CONFIG_ETRAX_ELPHEL_MT9X001 1

 void x313_dma_stop(){}

 void x313_dma_init(){}

 void reset_compressor(){}

// X3X3_SEQ_SEND1(frame16,  X313_WA_DCR0, X353_DCR0(SENSTRIGEN,async));

#include "pgm_functions.h"

//#include "x3x3.h"           // hardware definitions

#include "legacy_defines.h" // temporarily

#include "sensor_i2c.h"

/**